Fair question, the answer is that you cannot. However, note that I did not say libertarians reject all uses of force, only that "they would rather appeal to pe

Fair question, the answer is that you cannot. However, note that I did not say libertarians reject all uses of force, only that "they would rather appeal to people's self interest to achieve social outcomes than resort to force". I think we would both agree that the generosity of your neighbors represents the ideal. But if they weren't so generous, how you get them to share their coffee plow your drive way? Would you lobby for regulations to be passed to force them to stop hoarding their coffee? Have the police requisition their plow for the greater good? Or would you offer to compensate them for their goods and services? And if they refused, would you peacefully resign yourself to some other means of getting your needs met? The socialist often invokes the spirit of generosity with his rhetoric, but when others are (in his view) insufficiently generous, he is too quick to trade the pen for the club.